Process for the manufacture of nails formed in two parts



A. TRIVELLONI PROCESS FOR THE MANUFACTURE OF NAILS FORMED IN TWO PARTS July 24, 1923- 1,462,775

Filed Nov. 2, 1920 flngzo Fad/c2201: i

Elem neg Patented July 24, 1923.

UNITED STATES ANGELS TRIVELLONI, IEILA'N,

PROCESS FOR THE lhfiflIUFAUT'UI-HE Application filed November To all tU/LOHL it may concern Be it known that L ANGELO 'lnr 1on1, subject oi the King of Italy, res". .119; at lllilan, Kingdom Italy. are int d certain new and useful Improvements in sses for the ianuiact-ure oil l present recess for of the type poses wherein the head or weal-1 off the stud. is of a lain metal shank is of softer metal.

Various processes are known for the production of nails or studs oi? type in some of which a head is first :tormel or a hard metal, or a metal capable of being hard cned and a shank is termed of soft r ctal, the two formed parts being welded togetl and if necessary the heads hardened alter wards by any suitable means.

riccording to the present invention. two suitable bars, one oi hard and one of soil; metal, are cut into suitable lengths, and lengths of each are welded together end to end and the joined piece forged or sta l GILL metal together with a part of the soft metal. Such a process can be both simply and readily carried out on a large scale, and the resulting product has a perfect cohesion so far as the joint between the two parts is concerned.

In welding, the pieces are placed in contact with one another at the point where they are required to join, and are then weld- PATENT OFFICE.

ITALY.

CF NAILS FORIVZED IN TWO PARTS.

2, 1923. Serial No. 421,305.

d by any of the well known welding procasses but preferably by the electrical auto- ;enous welding process, by allowing the curn to flow through the two pieces pressed ther end to end.

lhe series of operations above described may, if desired, be reversed and the welding of the uncut pieces be effected first and the Na i-l he accompanying drawing represents by way of example one method of carrying out the invention.

1 shows two bars of metal, one a, of mild metal and the other, 5, of hard metal, arranged preparatory to being joined.

2 shows the bars of metal welded toheterogeneous bar shown in been formed into a head Z) a. non-slipping tire stud. and the shank on and the base a" of the head formed of the softer part (Fig. 2) of the original joined bar.

l: claim my invention:

An improved process for the manulao 'e of nails or studs of the type in which head if the ail or stud is of hard and welded to a shank of setter said process consisting in welding toend to end two suitable bars, one oi hard metal and the other of soft metah and then forging or stamping the oined piece so as to form a. head oi the whole of the hard metal.

In testimony whereof I ailix my signature.

Ire. NGELO TRIVELLONI. 

